Barrel-heater



(No Model.)

L. SEEEEMNf BARREL HEATERlv No. 423,496. Patented Mar. 18, 1890.

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'PATENT OFFICE;

LOUIS SHERMAN, OF MINNEAPOLIS, MINNESOTA.

BAfRREL-H EATER.

SPECIFICATION forming part of Letters Patent No. 423,496, dated March 18, 1890.

I Application filed June 15, 1889. Serial No. 314,429. (No model.)

4To all whom it may concern:

prising a suitable fire-pot, a cylindrical drum surrounding said fire-pot and eXtending'upward to nearly the height of the barrel, its

line o; .fr of Fig. 1, and Fig. 3

top, being provided with draft-openings and a door or lid through which fuel can be supplied to the heater, and a series of vertical ilues arranged between the fire-pot and drum extending nearly to the top of the drum and communicating through the base beneath to the smoke-flue, whereby a large amount of radiating-surface is provided foi` most efficient heating of the interior of the drum.

InV the accompanying drawings, forming a part of this specification, Figure 1 is a vertical longitudinal section of my improved barrel-heater; Fig. 2, a horizontal section on a similar section on line y y of Fig. 1.

In the drawings, 2 represents the inclosed base constructed, preferably, of cast-iron and provided with two compartments, one compartment 3 servingas the ash-pit and provided with t-he usual draft-openings 5 and communicatingwith the fire-pot 6, arranged above. The other compartment 4 partially surrounds the compartment 3, and leads from the heating-fines 8`to the smoke-pipe 7, the` solid partition 9 separating the two compartments. v

Arranged above the openings from the ashpit and in the bottom of the lire-pot is the grate 10, preferably supported upon the standard 1l,having the arm 12, by means of which Vthe grate is shaken or oscillated.l

13 is the heating-drum, preferably of sheet metal and cylindrical in form, secured upon ibetween it and the drum isthe series of heating-lines 8, open at the top and communieating at the bottom with the compartment 4e of the base. These flues extend, preferably, to nearly the top vof the drum, and serve as an outlet for the products of combustion from the fire lin the fire-pot. The barrel, with its Vstaves clamped in proper position,4 is placed around thedrum, resting upon the support 16, the heat radiated from the drum thus drying the staves and fixing the proper curvature.

By using a shallow fire-pot, from which the heated gases pass directly into the drum and, rising to the top, descend again through the heating-fines,havingalargeradiating-surface, a veryuniform and efficient heating of the drum is secured. --Tl1is is an essential and very important result. If the heating-drum l is unevenly heated, there will be corresponding lack of uniformity in the heating and drying of the barrel-staves, and in some cases danger of overheating certain parts before other parts are sufficiently dry. To secure this uniformity of heating of the drum from top Jto-,bottom, it is desirable that combustion should take place at every point within it,

which-is accomplished by my improved construction. The inflammable gases. as they rise from the fire andfill the drum are kindled to flame by means of the inflow of outer air through the upper draft-openings 15, so that the .whole interior of the drum is a lmass of names. v

The combination, with the vbase 2, having the two compartments 3 and 4, the compartment 3 having suitable draft-openings and the compartment 4 communication with the smoke-pipe, of the cylindrical heating-drum In testimony whereof I have hereunto set lro 13, secured upon,` said base and having the my hand this, 4th day of June, 1889. draft-opening 15, arranged in its top, the firepot 6, arranged above the compartment 3 and 5v within said drum, and the heating-nues 8, ar-

' ranged around said fire-pot and between it and said drum and communicating with the 4In presence ofl compartment 4, substantially as and for'the T. D. MERWIN, purposes set forth. A. C. PAUL.

,hi Louis +S SHERMAN.

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